.. _auto_curves_engtotruestress:

*ENGINEERING STRESS VS STRAIN CURVES TO TRUE STRESS VS STRAIN CURVE USING CONSTANT VOLUME ASSUMPTION*
=====================================================================================================

Converts engineering stress–strain curves to true stress–strain curves using the constant-volume (Cauchy) assumption. Supports tension, compression, and anisotropic tension loading; an optional Poisson's ratio can be supplied to account for volumetric compressibility.

When to use
-----------

Classification: **process**.

Tagged: ``anisotropic``, ``cauchy``, ``compression``, ``constant_volume``, ``engineering_stress``, ``engtotruestress``, ``material_conversion``, ``poissons_ratio``.

Inputs
------

.. list-table::
   :header-rows: 1
   :widths: 20 20 20 20 20 20

   * - Label
     - ID
     - Type
     - Default
     - Required
     - Description
   * - Engineering Stress Strain Curves
     - engineeringstressstraincurves
     - vector
     - —
     - 
     - One or more engineering stress–strain curves (stress in force/area units, strain dimensionless) to be converted; supply at least one curve for isotropic tension or compression loading.
   * - Axis
     - axis
     - text
     - both
     - 
     - Which axis/axes to transform: 'x' (strain only), 'y' (stress only), or 'both' (default); leave as 'both' for a full engineering-to-true conversion.
   * - Poissons Ratio
     - poissons_ratio
     - scalar
     - 0.0
     - 
     - Poisson's ratio (dimensionless, default 0.0) used to account for volumetric compressibility; set to 0.0 to enforce the strict constant-volume (incompressible) assumption.
   * - Loading Type
     - loading_type
     - string
     - tension
     - 
     - Loading mode: 'tension' (default), 'compression', or 'tension_anisotropic'; select 'tension_anisotropic' when transversal and thickness strain curves are available for anisotropic materials.
   * - Eng Stress Vs Transversal Strain
     - eng_ss_vs_transversal_strain
     - vector
     - —
     - 
     - Engineering stress expressed as a function of transversal strain (required only when loading_type is 'tension_anisotropic'); leave unset for isotropic tension or compression.
   * - Eng Stress Vs Thickness Strain
     - eng_ss_vs_thickness_strain
     - vector
     - —
     - 
     - Eng stress provided as function of thickness strain   <a class='btn btn-xs btn-default' target='_blank' href='https://www.d3view.com/docs/master/workflows/Glossary.html#curveinput'> <i class='fa fa-external-link'> </i> View more </a>

Outputs
-------

.. list-table::
   :header-rows: 1
   :widths: 20 20 20 20

   * - Label
     - ID
     - Type
     - Description
   * - curves_engtotruestress_output_1
     - curves_engtotruestress_output_1
     - vector
     - Converted true stress–strain curve(s) corresponding to the input engineering curves, with axes transformed according to the selected axis and loading-type settings.

Disciplines
-----------

- data.curve.transform
- engineering.material.characterization

Runnable example
----------------

A runnable example is registered for this worker. Open the example workflow on the d3VIEW canvas: `/api/workflow/example?id=curves_engtotruestress <https://www.d3view.com/api/workflow/example?id=curves_engtotruestress>`_

.. raw:: html

   <hr style="margin-top:2em">
   <p style="font-size:11px;color:#888">
   Auto-generated from <code>transformation</code> schema. Worker id: <code>curves_engtotruestress</code>. Schema hash: <code>95bb0d8ed629</code>. Hand-curated docs in <code>workerexamples/</code> override this page when present.
   </p>